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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
use deno_core::error::type_error;
use deno_core::error::AnyError;
use deno_core::Resource;
use digest::Digest;
use digest::DynDigest;
use std::borrow::Cow;
use std::cell::RefCell;
use std::rc::Rc;
pub enum Hash {
Md4(Box<md4::Md4>),
Md5(Box<md5::Md5>),
Ripemd160(Box<ripemd::Ripemd160>),
Sha1(Box<sha1::Sha1>),
Sha224(Box<sha2::Sha224>),
Sha256(Box<sha2::Sha256>),
Sha384(Box<sha2::Sha384>),
Sha512(Box<sha2::Sha512>),
}
pub struct Context {
pub hash: Rc<RefCell<Hash>>,
}
impl Context {
pub fn new(algorithm: &str) -> Result<Self, AnyError> {
Ok(Self {
hash: Rc::new(RefCell::new(Hash::new(algorithm)?)),
})
}
pub fn update(&self, data: &[u8]) {
self.hash.borrow_mut().update(data);
}
pub fn digest(self) -> Result<Box<[u8]>, AnyError> {
let hash = Rc::try_unwrap(self.hash)
.map_err(|_| type_error("Hash context is already in use"))?;
let hash = hash.into_inner();
Ok(hash.digest_and_drop())
}
}
impl Clone for Context {
fn clone(&self) -> Self {
Self {
hash: Rc::new(RefCell::new(self.hash.borrow().clone())),
}
}
}
impl Resource for Context {
fn name(&self) -> Cow<str> {
"cryptoDigest".into()
}
}
use Hash::*;
impl Hash {
pub fn new(algorithm_name: &str) -> Result<Self, AnyError> {
Ok(match algorithm_name {
"md4" => Md4(Default::default()),
"md5" => Md5(Default::default()),
"ripemd160" => Ripemd160(Default::default()),
"sha1" => Sha1(Default::default()),
"sha224" => Sha224(Default::default()),
"sha256" => Sha256(Default::default()),
"sha384" => Sha384(Default::default()),
"sha512" => Sha512(Default::default()),
_ => return Err(type_error("unsupported algorithm")),
})
}
pub fn update(&mut self, data: &[u8]) {
match self {
Md4(context) => Digest::update(&mut **context, data),
Md5(context) => Digest::update(&mut **context, data),
Ripemd160(context) => Digest::update(&mut **context, data),
Sha1(context) => Digest::update(&mut **context, data),
Sha224(context) => Digest::update(&mut **context, data),
Sha256(context) => Digest::update(&mut **context, data),
Sha384(context) => Digest::update(&mut **context, data),
Sha512(context) => Digest::update(&mut **context, data),
};
}
pub fn digest_and_drop(self) -> Box<[u8]> {
match self {
Md4(context) => context.finalize(),
Md5(context) => context.finalize(),
Ripemd160(context) => context.finalize(),
Sha1(context) => context.finalize(),
Sha224(context) => context.finalize(),
Sha256(context) => context.finalize(),
Sha384(context) => context.finalize(),
Sha512(context) => context.finalize(),
}
}
}
impl Clone for Hash {
fn clone(&self) -> Self {
match self {
Md4(_) => Md4(Default::default()),
Md5(_) => Md5(Default::default()),
Ripemd160(_) => Ripemd160(Default::default()),
Sha1(_) => Sha1(Default::default()),
Sha224(_) => Sha224(Default::default()),
Sha256(_) => Sha256(Default::default()),
Sha384(_) => Sha384(Default::default()),
Sha512(_) => Sha512(Default::default()),
}
}
}
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